基于复杂柔性运动流场数值求解的动网格方案及应用

doi:10.16183/j.cnki.jsjtu.2018.04.004

摘要/Abstract

摘要： 为解决在复杂柔性边界非定常变化的流场中高精度结构化网格的应用问题，提出一种二维贴体结构网格快速生成的动网格计算方案，基于代数法对流场边界进行贴体网格快速生成，根据边界的变化，随时间步快速生成新的高质量结构化网格.应用于类鱼体柔性推进流场的计算结果显示，所提出的方案在计算负荷、网格交叉、多时间步网格质量等方面性能良好，充分显示了结构化网格在网格生成速度、网格质量、计算精度、湍流模型适用性等方面的优势，为柔性运动的流场研究提供了新方案.

关键词: 数值模拟, 复杂柔性运动流场, 动网格技术, 贴体结构网格, 类鱼推进

Abstract: In order to apply the high-precision structured grids in the flow field with complicated moving and flexible boundaries, a new adaptive control generation dynamic grids method is developed based on two-dimensional body fitted grids. The grids generation method is proposed to generate updated high-precision body fitted structured grids in each time step according to movements of boundaries. A numerical study of fish-like propulsion is carried out by using the new method, and the high computational cost, the grids intersection and quality reduction have effectively been avoided. It makes a full use of advantages of structured grids in accuracy and rate of grids generation and applicability of turbulence models. This new grid generation method is benefitial to the research of flow problems with the moving and flexible boundaries.

Key words: numerical simulation, complicated flexible movement flow field, dynamic grids method, body fitted structured grids, fish-like propulsion

中图分类号:

O 351.2

郭泽宇，陈作钢. 基于复杂柔性运动流场数值求解的动网格方案及应用[J]. 上海交通大学学报（自然版）, 2018, 52(4): 403-409.

GUO Zeyu1,CHEN Zuogang1,2. A Dynamic Grids Method for Numerical Simulation of Complicated Flexible Movement Flow Field and Its Application[J]. Journal of Shanghai Jiaotong University, 2018, 52(4): 403-409.

参考文献

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